v1.28.3

Fixed

• Fix deselect on double-clicking for gl2d traces [#1811]
• Fix Plotly.purge for gl2d and gl3d subplots
  (bug introduced in 1.28.0, leading to memory leaks) [#1821]
• Fix hover labels for ohlc and candlestick traces
  (bug introduced in 1.28.0) [#1808]
• Fix event data for scattergeo traces [#1819]
• Fix support of HTML entity number in pseudo-html inputs [#1820]

v1.28.2

Fixed

• Fix IE rendering error (node.children doesn't work on SVG nodes in IE) [#1803]

v1.28.1

Fixed

• Fix scattergl selected points. Points do not disappear after zoom any more
  in fast mode [#1800]

v1.28.0

Added

• Allow constraints by domain on cartesian axes using new axis attributes:
  constrain: 'domain' and constraintoward [#1767]
• Add gl3d annotations [#1638, #1786]
• Add support for lasso and select dragmode on scattergl traces [#1657]
• Add 48 new scattergl marker symbols (for total of 56) [#1781]
• Add array support for hoverinfo [#1761]
• Add animation support for fillcolor attribute [#1722]
• Add colorscale attributes to mesh3d traces [#1719]
• Add support for target and popup attributes pseudo-html text links [#1726]
• Add per-direction updatemenu dropdown arrows [#1792]
• Add execute attribute to sliders and updatemenus to skip method calls while
  still triggering associated events [#1700]
• Add skip value to the method attribute for sliders and updatemenus which
  acts as a no-op [#1699]

Changed

• Include values of all array attributes in hover/click/select event data
  including ids and customdata [#1770]
• Make gl2d axis tick labels on-par with SVG versions [#1766]
• Build SVG text nodes directly instead of using DOMParser [#1783]
• Rework transform style into array syntax [#1794]
• Recompute hover on click to increase click robustness [#1646]
• Miscellaneous performance improvements including improved bounding box caching
  and adding a few short-circuit [#1772, #1792]

Fixed

• Fix pan/zoom for layout component linked to category axes [#1748, #1791]
• Fix non-linear gl3d axis range settings [#1730]
• Fix ohlc and candlestick when open value equals close value [#1655]
• Fix annotations positioning when MathJax symbols are present [#1788]
• Fix array values in event data for transformed traces [#1717, #1727, #1737]
• Fix relayout event data for gl3d camera interactions [#1732]
• Fix scatter markers and text nodes linked to ids ordering on updates [#1709]
• Fix Plotly.validate for dynamic enumerated attribute
  (e.g. axis anchor, overlaying) [#1769]
• Fix pseudo-html handling in sliders, updatemenus, range-sliders,
  range-selectors and carpet traces [#1792]
• Fix annotation bounding box and arrow heads in IE [#1782]
• Fix svg exports in IE for graphs with multiple clip paths [#1740]
• Fix sankey positioning in IE [#1723, #1731, #1729, #1735]
• Fix relative links in IE [#1715]
• Suppress render warning in gl3d graphs with error bars [#1718]

v1.27.1

Fixed

• Fix text box positioning on scrolled windows (bug introduced in 1.27.0) [#1683, #1690]
• Fix styling over links in annotation text [#1681]
• Fix mesh3d with vertexcolor coloring [#1686]
• Fix sort transform with set categoryarray [#1689]
• Fix scatter text node data join [#1672]
• Fix plot promise resolution in graphs with layout images in IE11 [#1691]

v1.27.0

Added

• Sankey diagram with new trace type sankey [#1591, #1664]
• Add hoverlabel trace and layout attributes to customize hover label colors
  and fonts [#1582]
• Add marker.gradient attributes for scatter, scattergeo, scatterternary
  and scattercarpet traces [#1620]
• Add sort transform [#1609]
• Add preservegaps filter transform attribute [#1589]
• Add != (not equal) filter transform operation [#1589]
• Add labelfont, tickfont and rangefont attributes for parcoords traces
  [#1624]
• Pass DOM mouse event on plotly_clickannotations events [#1652]

Changed

• Performance optimization for range sliders and Drawing cache [#1585]

Fixed

• Fix scattergl marker symbol positioning (bug introduced in 1.25.0) [#1633]
• Fix gl2d zoom where two clicks would trigger a zoom box (bug introduced 1.26.0) [#1632]
• Fix legend double click handler for carpet traces [#1636]
• Fix restyle for scattercarpet for style attributes with array support [#1641]
• Fix restyle for array layout components when more than 10 items are present
  [#1639]
• Fix select-box and lasso selections so that they don't include bad-data items
  [#1656]
• Fix restyle for contour zmin and zmax [#1653]
• Fix scatter text node transitions [#1616, #1626]

v1.26.1

Fixed

• Fix pie fill opacity [#1615]
• Fix contour.value declaration for contourcarpet trce [#1612]

v1.26.0

Added

• Carpets plots with new trace types: carpet, scattercarpet and
  contourcarpet [#1595, #1596]
• Axis constraints with new cartesian and gl2d axis attributes scaleanchor and
  scaleratio [#1522]
• Annotations width, height, valign and xshift and yshift attributes
  [#1551, #1590]
• Hover text over annotations with hovertext and hoverlabel attributes
  [#1573, #1590]
• Add hovertext attribute to trace types that can show text values on graph
  to allow setting hover text independently [#1523]
• Add spikes interactions functionality to cartesian subplots [#1461]
• Pass mouse DOM mouse event during plotly_click, plotly_hover and
  plotly_unhover [#1505]
• Add visible attribute to cartesian and gl3d axes to easily make them
  disappear [#1595, #1599]
• Make deleteFrames(gd) delete all frames [#1531]

Changed

• Lock down gl-plot3d and matrix-camera-controller dependencies to include
  latest memory management improvements [#1570]
• Performance improvements for category axes [#1544]
• Skip overhead for showLink config option is false [#1557]
• Optimize scatter trace sorting on updates [#1555]
• Lock down gl-scatter2d-sdf dependency to 1.3.4 while waiting for bug fix
  there [#1572]

Fixed

• Fix bar sizes of traces with (x,y) NaN items [#1519]
• Fix handling of NaN items in array-ok attributes for scattergeo and
  scattermapbox traces [#1538, #1564]
• Fix hover label position for bar traces with set width [#1527]
• Fix restyle for attribute containers [#1536]
• Fix restyle exception for scattergl traces with no y data [#1567]
• Fix animation of text nodes that contain <br>s [#1602]
• Fix toImage for mapbox subplots when access token is set in the config
  options [#1598]
• Emit plotly_hover on pie traces when hoverinfo: 'none' [#1505]
• Pass trace info during plotly_click on pie traces [#1505]
• Pass through the wheel event if the scrollbar is at the very top or bottom
  [#1588]

v1.25.2

Fixed

• rm const token from dist bundles that depend on big-rat,
  see rat-nest/big-rat#4 for more details.

v1.25.1

Fixed

• Fix restyle for scattergl traces with array marker.size (bug introduced
  in 1.25.0) [#1521]
• Fix relayout for histogram2dcontour traces [#1520]
• Do not unnecessary mutate parcoords full trace objects when computing
  line color and colorscale [#1509, #1508]
• Do not unnecessary coerce trace opacity in parcoords traces [#1506]